CN106907922B - Kiln tail smoke chamber of rotary cement kiln provided with negative pressure adjusting device - Google Patents
Kiln tail smoke chamber of rotary cement kiln provided with negative pressure adjusting device Download PDFInfo
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- CN106907922B CN106907922B CN201710147503.5A CN201710147503A CN106907922B CN 106907922 B CN106907922 B CN 106907922B CN 201710147503 A CN201710147503 A CN 201710147503A CN 106907922 B CN106907922 B CN 106907922B
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- Prior art keywords
- kiln tail
- smoke chamber
- tail smoke
- kiln
- chamber body
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/30—Arrangements of partitions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/36—Arrangements of air or gas supply devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
Abstract
The invention discloses a cement rotary kiln tail smoke chamber provided with a negative pressure adjusting device, which comprises a kiln tail smoke chamber body, wherein the upper part of the kiln tail smoke chamber body is provided with a decomposing furnace communicating port, the side surface of the bottom of the kiln tail smoke chamber body is provided with a cement rotary kiln communicating port, the middle part of the side wall of the kiln tail smoke chamber body is provided with a discharging port, the bottom of the kiln tail smoke chamber body is provided with a discharging slope extending from the lower edge of the discharging port to the lower edge of the cement rotary kiln communicating port, the middle position of the discharging slope is provided with a baffle, and when a material discharged from a raw material discharging pipe passes through the baffle, part of the material is lifted by kiln tail waste gas and ascends. According to the invention, by increasing the matching adjustment mode of the tertiary air and the air used in the kiln, the ventilation cross-sectional areas of the throat of the kiln tail smoke chamber and the tertiary air pipe are increased, the ineffective system resistance is reduced, and the energy is saved and the consumption is reduced.
Description
Technical Field
The invention relates to the technical field of cement rotary kilns, in particular to a rotary cement kiln tail smoke chamber provided with a negative pressure adjusting device and suitable for clinker production in the cement industry.
Background
In the production process of cement clinker, the grate cooler is an important host machine device in a clinker firing system of a cement plant, and has the main functions of cooling and conveying the cement clinker; the high-temperature air (primary air) from the grate cooler enters the cement rotary kiln, coal powder is sprayed into the cement rotary kiln for combustion, kiln tail waste gas enters the cone part of the decomposing furnace through a kiln tail smoke chamber, raw materials from a raw material discharging pipe enter the cement rotary kiln along the slope of the kiln tail smoke chamber, the matching between the cement rotary kiln and tertiary air is adjusted by adjusting the opening size of a tertiary air baffle valve, the negative pressure of the kiln tail is kept at-500 Pa, the outlet pressure of the tertiary air is kept at-300 Pa, and about 60-70% of air passes through a tertiary air pipe.
In the production process of cement clinker, when flying sand in the clinker is more, the flying sand can be deposited in the tertiary air pipe, the resistance of tertiary air is increased, the matching between the inside of the rotary cement kiln and the tertiary air is readjusted by gradually increasing the opening of the tertiary air valve in the production process, and when the tertiary air valve is fully opened, the balance can not be maintained. A large amount of manpower and material resources are needed to clean the aggregate in the tertiary air duct during each overhaul, and the environmental pollution is large and unsafe during construction.
The applicant has therefore made an advantageous search and attempt to solve the above-mentioned problems, in the context of which the technical solutions to be described below have been created.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the kiln tail smoke chamber of the rotary cement kiln provided with the negative pressure adjusting device is provided aiming at the defects of the prior art, and the negative pressure of the kiln tail smoke chamber is adjusted through the negative pressure adjusting device, so that the air consumption in the rotary cement kiln is controlled, the proportion of the air consumption in the rotary cement kiln and the tertiary air is adjusted, the decomposition rate of materials in the kiln is improved, and the energy is saved and the consumption is reduced.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
a kiln tail smoke chamber of a cement rotary kiln provided with a negative pressure adjusting device comprises a kiln tail smoke chamber body, a raw material discharging pipe and a tertiary air pipe, wherein a decomposing furnace communicating port is formed in the upper part of the kiln tail smoke chamber body, a cement rotary kiln communicating port is formed in the side face of the bottom of the kiln tail smoke chamber body, the decomposing furnace communicating port and the cement rotary kiln communicating port of the kiln tail smoke chamber body are respectively connected with the bottom of a furnace body of a decomposing furnace and the kiln tail of the cement rotary kiln, so that the kiln tail smoke chamber body communicates the cement rotary kiln with the decomposing furnace, a discharging port is formed in the middle of the side wall of the kiln tail smoke chamber body, a discharging slope extending from the lower edge of the discharging port to the lower edge of the cement rotary kiln communicating port is formed at the bottom of the kiln tail smoke chamber body, the lower end of the raw material discharging pipe is connected with the discharging port of the kiln tail smoke chamber body, the other end of the raw material discharging pipe inclines upwards and outwards, one end of the tertiary air pipe is connected to the outside of the bottom of the decomposing furnace, the other end of the kiln tail smoke chamber is connected with a tertiary air pipe outwards, and a tertiary air valve is arranged on the tertiary air pipe; the device is characterized in that a baffle is arranged in the middle of the blanking slope, and when materials from the raw material blanking pipe pass through the baffle, part of the materials are lifted by kiln tail waste gas and rise.
In a preferred embodiment of the invention, the baffle is inserted into the kiln tail smoke chamber body from the outer side surface of the kiln tail smoke chamber body, and the amount of material lifted by kiln tail waste gas is adjusted by adjusting the insertion depth of the baffle.
In a preferred embodiment of the present invention, the baffle is an L-shaped baffle, one side of the L-shaped baffle leans against the slope surface of the blanking slope, and the other side of the L-shaped baffle is perpendicular to the slope surface of the blanking slope.
In a preferred embodiment of the invention, the baffle is made of heat resistant steel.
Due to the adoption of the technical scheme, the invention has the beneficial effects that: because the baffle is arranged at the middle position of the blanking slope of the kiln tail smoke chamber body, partial materials discharged from the raw material blanking pipe are lifted by kiln tail waste gas when passing through the baffle, the negative pressure at the kiln tail is also lifted, and the ventilation in the kiln is correspondingly reduced. During normal production, the tertiary air valve is fully opened, and the material quantity raised by kiln tail waste gas is adjusted by adjusting the insertion depth of the baffle plate, so that the negative pressure of the kiln tail is adjusted to be matched with the negative pressure of the tertiary air outlet. When the aggregate in the tertiary air pipe needs to be cleaned, the air quantity of the system is kept unchanged, the insertion depth of the baffle is adjusted to the maximum, and the aggregate in the tertiary air pipe can be cleaned after about 8 hours of operation. According to the invention, by increasing the matching adjustment mode of the tertiary air and the air used in the kiln, the ventilation cross-sectional areas of the throat of the kiln tail smoke chamber and the tertiary air pipe are increased, the ineffective system resistance is reduced, and the energy is saved and the consumption is reduced. In addition, the baffle plate has the advantages of small volume, low manufacturing cost and convenience for adjustment and sealing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is an enlarged view of fig. 1 at a.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
Referring to fig. 1, a kiln tail smoke chamber of a rotary cement kiln provided with a negative pressure regulating device is shown, and comprises a kiln tail smoke chamber body 100, a raw material blanking pipe 200 and a tertiary air pipe 300.
The upper part of the kiln tail smoke chamber body 100 is provided with a decomposing furnace communicating port 110, the side surface of the bottom of the kiln tail smoke chamber body 100 is provided with a cement rotary kiln communicating port 120, and the decomposing furnace communicating port 110 and the cement rotary kiln communicating port 120 of the kiln tail smoke chamber body 100 are respectively connected with the bottom of the decomposing furnace 10 and the kiln tail 20 of the cement rotary kiln, so that the kiln tail smoke chamber body 100 communicates the cement rotary kiln 20 with the decomposing furnace 10. A discharging opening 130 is formed in the middle of the side wall of the kiln tail smoke chamber body 100, and a discharging slope 140 extending from the lower edge of the discharging opening 130 to the lower edge of the communication opening 120 of the rotary cement kiln is formed at the bottom of the kiln tail smoke chamber body 100.
The raw material feeding pipe 200 has a lower end 210 connected to the feeding port 130 of the kiln tail gas chamber body 100 and another end 220 extending obliquely upward and outward. One end 310 of the tertiary air pipe 300 is connected to the outer side of the bottom of the decomposing furnace 10, the other end 320 of the tertiary air pipe extends outwards and is connected with a tertiary air source, and a tertiary air valve for adjusting the air intake of the tertiary air pipe 300 is arranged on the tertiary air pipe 300.
A baffle 400 is arranged in the middle of the blanking slope 140 of the kiln tail smoke chamber body 100, when the material from the raw material blanking pipe 200 passes through the baffle 400, part of the material is lifted by kiln tail waste gas and rises, the negative pressure at the kiln tail rises accordingly, and the ventilation in the kiln is correspondingly reduced. Preferably, the baffle 400 is inserted into the kiln tail smoke chamber body 100 from the outer side surface of the kiln tail smoke chamber body 100, so that the amount of materials lifted by kiln tail waste gas can be adjusted by adjusting the insertion depth of the baffle 400, and the negative pressure of the kiln tail is adjusted to be matched with the negative pressure of the tertiary air outlet. When the aggregate in the tertiary air pipe needs to be cleaned, the air quantity of the system is kept unchanged, the insertion depth of the baffle 400 is adjusted to be the maximum, and the aggregate in the tertiary air pipe 300 can be cleaned after about 8 hours of operation.
Referring to fig. 2, in the present embodiment, the baffle 400 is an L-shaped baffle, one side 410 of the L-shaped baffle rests on the slope surface of the blanking slope 140 of the kiln tail smoke chamber body 100, and the other side 420 of the L-shaped baffle is perpendicular to the slope surface of the blanking slope 140 of the kiln tail smoke chamber body 100. The baffle 400 is made of heat-resistant steel, so that the baffle 400 can be normally used in a high-temperature environment.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A kiln tail smoke chamber of a cement rotary kiln provided with a negative pressure adjusting device comprises a kiln tail smoke chamber body, a raw material discharging pipe and a tertiary air pipe, wherein a decomposing furnace communicating port is formed in the upper part of the kiln tail smoke chamber body, a cement rotary kiln communicating port is formed in the side face of the bottom of the kiln tail smoke chamber body, the decomposing furnace communicating port and the cement rotary kiln communicating port of the kiln tail smoke chamber body are respectively connected with the bottom of a furnace body of a decomposing furnace and the kiln tail of the cement rotary kiln, so that the kiln tail smoke chamber body communicates the cement rotary kiln with the decomposing furnace, a discharging port is formed in the middle of the side wall of the kiln tail smoke chamber body, a discharging slope extending from the lower edge of the discharging port to the lower edge of the cement rotary kiln communicating port is formed at the bottom of the kiln tail smoke chamber body, the lower end of the raw material discharging pipe is connected with the discharging port of the kiln tail smoke chamber body, the other end of the raw material discharging pipe inclines upwards and outwards, one end of the tertiary air pipe is connected to the outside of the bottom of the decomposing furnace, the other end of the kiln tail smoke chamber is connected with a tertiary air pipe outwards, and a tertiary air valve is arranged on the tertiary air pipe; the device is characterized in that a baffle is arranged in the middle of the blanking slope, and when materials from the raw material blanking pipe pass through the baffle, part of the materials are lifted by kiln tail waste gas and rise.
2. The rotary cement kiln tail smoke chamber provided with the negative pressure adjusting device according to claim 1, wherein the baffle is inserted into the kiln tail smoke chamber body from the outer side surface of the kiln tail smoke chamber body, and the amount of material lifted by kiln tail waste gas is adjusted by adjusting the insertion depth of the baffle.
3. The rotary cement kiln tail smoke chamber provided with the negative pressure adjusting device as claimed in claim 2, wherein the baffle is an L-shaped baffle, one side of the L-shaped baffle leans against the slope surface of the blanking slope, and the other side of the L-shaped baffle is perpendicular to the slope surface of the blanking slope.
4. The rotary cement kiln tail smoke chamber provided with the negative pressure adjusting device as claimed in any one of claims 1 to 3, wherein the baffle is made of heat-resistant steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710147503.5A CN106907922B (en) | 2017-03-13 | 2017-03-13 | Kiln tail smoke chamber of rotary cement kiln provided with negative pressure adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710147503.5A CN106907922B (en) | 2017-03-13 | 2017-03-13 | Kiln tail smoke chamber of rotary cement kiln provided with negative pressure adjusting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106907922A CN106907922A (en) | 2017-06-30 |
| CN106907922B true CN106907922B (en) | 2022-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710147503.5A Active CN106907922B (en) | 2017-03-13 | 2017-03-13 | Kiln tail smoke chamber of rotary cement kiln provided with negative pressure adjusting device |
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| Country | Link |
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| CN (1) | CN106907922B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834323A (en) * | 2021-10-08 | 2021-12-24 | 华润水泥技术研发（广西）有限公司 | Rotary kiln gas flow velocity control method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2859422Y (en) * | 2005-12-24 | 2007-01-17 | 张相红 | Cement predecomposing and kiln-tail sheet-preventing smoke room |
| CN202648402U (en) * | 2012-03-30 | 2013-01-02 | 新疆天业（集团）有限公司 | Device for calcining portland cement clinker by using high chlorine ion residue raw material |
| CN203336972U (en) * | 2013-05-24 | 2013-12-11 | 滕州中联水泥有限公司 | Discharge tongue-type plate assembly of feed-end chamber of dry-method cement kiln |
| CN204100783U (en) * | 2014-09-16 | 2015-01-14 | 郑州嘉耐特种铝酸盐有限公司 | Rotary kiln hermetically-sealed construction |
| CN204329580U (en) * | 2014-11-28 | 2015-05-13 | 天瑞集团水泥有限公司 | A kind of rotary kiln and kiln tail smoke-box sealing and connecting device |
| CN205090795U (en) * | 2015-09-22 | 2016-03-16 | 湖北白兆山水泥有限公司 | Kiln tail sealing device |
| CN206683392U (en) * | 2017-03-13 | 2017-11-28 | 上海万澄环保科技有限公司 | A kind of cement rotary kiln kiln tail smoke-box for being provided with negative pressure adjusting device |
-
2017
- 2017-03-13 CN CN201710147503.5A patent/CN106907922B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2859422Y (en) * | 2005-12-24 | 2007-01-17 | 张相红 | Cement predecomposing and kiln-tail sheet-preventing smoke room |
| CN202648402U (en) * | 2012-03-30 | 2013-01-02 | 新疆天业（集团）有限公司 | Device for calcining portland cement clinker by using high chlorine ion residue raw material |
| CN203336972U (en) * | 2013-05-24 | 2013-12-11 | 滕州中联水泥有限公司 | Discharge tongue-type plate assembly of feed-end chamber of dry-method cement kiln |
| CN204100783U (en) * | 2014-09-16 | 2015-01-14 | 郑州嘉耐特种铝酸盐有限公司 | Rotary kiln hermetically-sealed construction |
| CN204329580U (en) * | 2014-11-28 | 2015-05-13 | 天瑞集团水泥有限公司 | A kind of rotary kiln and kiln tail smoke-box sealing and connecting device |
| CN205090795U (en) * | 2015-09-22 | 2016-03-16 | 湖北白兆山水泥有限公司 | Kiln tail sealing device |
| CN206683392U (en) * | 2017-03-13 | 2017-11-28 | 上海万澄环保科技有限公司 | A kind of cement rotary kiln kiln tail smoke-box for being provided with negative pressure adjusting device |
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| Publication number | Publication date |
|---|---|
| CN106907922A (en) | 2017-06-30 |
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